is this a proper run-on sentence ....Patty and I love to go to the beach , and we leave early in the morning to beat the crowds.

If you mean "is this a corrected run-on sentence," then you're right! Nice job.

It is a correct runon sentance, congrats

No, the sentence you provided is not a run-on sentence. It is a compound sentence because it consists of two independent clauses joined by the coordinating conjunction "and." A run-on sentence occurs when two or more independent clauses are incorrectly combined without proper punctuation or conjunctions.

To determine if a sentence is a run-on, you can follow these steps:
1. Identify all the clauses (independent and dependent) in the sentence.
2. Check how these clauses are joined together.
3. Determine if there is appropriate punctuation or conjunctions used to connect the clauses.

In your sentence:
- "Patty and I love to go to the beach" is an independent clause.
- "we leave early in the morning to beat the crowds" is also an independent clause.

These two independent clauses are joined by the coordinating conjunction "and," which is perfectly acceptable. Since the sentence is correctly punctuated and connected, it is not a run-on sentence.